Federer dominated

Seventh seed Federer dominated the first set but was taken to a tie-break in the second before prevailing 6-2, 7-6(5) against French qualifier Paul-Henri Mathieu, while Swiss compatriot and Australian Open champion Stanislas Wawrinka clinched a 6-3, 7-5 win over Croatia's Ivo Karlovic.

Australian Lleyton Hewitt failed to notch his 600th career win when he was beaten by South African Kevin Anderson 7-6(5), 6-4.

The veteran Hewitt saved 10 of 11 break points but was unable to break the tall 17th seed's powerful serve in the match.

There was high drama in another match as Colombian Alejandro Falla saved a match point at 5-2 down in the third set to beat Polish 18th seed Jerzy Janowicz 6-3, 2-6, 7-6(5).